Pump jack



Sept. 15. 1925.

E. R. THOMAS ET AL PUMP JACK Filed Dec. 4 1924 '2 sneets sheet 1 is; .A0 W INVENTOR 1/? 7,1007%),

WITNESSES "X2 2 ATTORNEYS Sept. 15, 1925. r 1,553,486-

E. R. THOMAS ET AL v PUMP JACK 'mea'nec. 4.15:4 2 Shoots-Sheet 2ATTORNEYS rm INVENTOR w .ZZ/PTVW Patented Sept. 15, 1925.

STATES ELMERET THOMKsANI'Jf PEARLEY Letterman, on SHiDLER, oKLAHoMA.

PUMP JACK.

Application filed"Demamber4; 1924'. Seria1'N'o; 753,938.

T o all whom it-maywou'cem; 4 5

Be itk-nownthat; we, ELMER R; THOMAS and PEARLEY\ E"; LANG ITT, citlzensof the United States, and residents of Shidler, in, s the Oklahoma,haveinvented certain new and useful Improvements in- Pump Jacks, of

county; of Osage and State of which the following is: a specification.

This invention relates to pump jacks foruse'with oil wel;l' equipmentand "aims to.

providei a-simple, novel and effective means for transmitting motionfrom the shackle rod line-to; thepolishrod', and also to provide meansfor preventi-n-g in-jury or damage, to the mechanism off the jack ortothe as sociated i parts 7' of the ;oil well equipment in the event ofbreakage of theshackle rod line.--

Otherobjects and advantages of'the invention reside-.111 certain novelfeatures of theconstruct-ion, combination and arrangement of piartswhichwillbehereinafter more fully described and particularly pointed out inthe appended claims,- reference being had to theaccompanying-drawingsforming part of this specification,- and in which:

Figure 1 is a view in side elevation showing one embodiment of l theinvention,

Fi gure:-2is-afragmentary group View in" perspective of certain-of the?parts prior to assembly, and v,

Figure 3 is a View in end -elevation looking toward the left of'Fig. 1.

In the drawings, a- -b,ase is designated at 1 and on the base: 1 spacedsills 2 are supported and secured. Standards -3. extend vertically fromthe. base-and have theinlow'er ends suit ablyfsecure'd' to the sills 2.Brace members 4 and'5 'are' provided for the standards 3,- the'bracemembers extending between the sills 2 and the standards 3 and beingsuitably fastened to both.

The upper ends of the standards 3 carry bearings 6 which receivetrunnions 8 projecting from the sides of saddle 9 on which the centersof the spaced members 10 of a walking beam 11 are fastened.

At one end of the walking beam 11 a bearing block 12 is secured, thebearing block having a body portion 13 which fits between the members 10and is secured thereto having flanges 14 continuous with its top andresting on the tops of the members 10. The forward end of the bearingblock is slotted, as at 15, from its top to its bottom and portions ofthe bearing block on the opposite sides of the slet are provided withalin ed grooves 16 to receive the trunnions lfl of a timber screw '18 orother suitable device,

whereby'the'walking beam is connected to the polish rod 19. v

For transmitting motion from the shackle rod lineto the. walking beam a;truss frame,

designated-generally at 21, is provided and includes spaced horizontalmembers 22, spaced vertical members 23 and an inclined member 24. Themembers'of the truss frame are secured to each other and are held inspaced relation byvirtue of the interpositionof the reduced extensions25 of the inclined member24 in between the spaced elements ofthehorizontal andvertical members 22'and 23.- A bearing blo'ck 26isprovided tofacilitate connection between the truss frame andtheshackle rod. line and has a.- portion 27 extending between andsecured to the elements of-the vertical member of the truss frame andthis also aids in-holdelements of this horizontalmember 22 andsecuredthereto. he elements of-the horizontaltruss-member will extendbeyond the vertica-l'member 23,-as indicated-at 30, and these extensions30 are pivotally mounted, as at 31,0n the upper end-of a link 32 whichis pivotally secured, as at; 33,130 a bearing block 34 fastened to, thesills 2.

The position of the link- 32 is controlled by means of a rod 35 whichhas a turnbuckle 36 embodied therein; I The rod,;35 connects to thestationary structure "of the base or to the casing head. 1 c f e Themotion of theftruss: frame-is trans mitted to the calking beam by meansof a pair of oppositely disposed U-shaped stirrups 40 having their legssecured to a connecting base 41. One of the stirrups engages the block28 and the other engages a block 42 fastened to the spaced members ofthe walking beam. 7

Inorder to prevent damage or injury to r mal operation of the jack andso long as the shackle rod line remains intact, the support ing post 50is not engaged with the walkmg beam since its upper end is immediatelybelow the lowest position assumed by the walking beam at such times. a I

' In the event the shackle rod line breaks the weight of the polish rodand the parts 'carried 'thereby' tends to cause the polish rod to moveforcibly down to an extent beyond the limit of its normal stroke andconsequently'break orinjure the parts of the oil well equipment and theparts of the pump jack. Such excessive downward movement is, however,prevented in the structure proposed by the present invention foras soonas the shackle rod line breaks the resulting movement of the pump jackswings the post 50 to the right as viewed in the drawings to positionthe same to engage the walking beam and support the same andconsequently the parts of the oil well equipment connected therewith.

e claim:

1. Apump jack'including a walking beam and a shackle red line andcompris ng 'means for transmitting motion from the shackle rodline tothe walking beam, and a supporting post operated from said means andengageable with the walking beam to support the same and the partscarried thereby in the event of breakage of the shackle line. I

' 2. 'A pump ja'ck including a walking beam and a shackle rod line andcomprising motion transmission means between the shackle rod llne andthe walkmg beam, sald motion with the walking beam and also having avertical member connected with the shackle rod line, a supporting postengageable with the walking beam for supporting the same and the partscarried thereby in the event of breakage of the shackle rod line, andalink-connecting the vertical member of the truss frame and thesupporting post.

3. A pump jack including 'a base, a sill on'said base, a standardsecured to the sill, a walking beam pivotally supported on the standard,a shackle rod line and motion transmissio'n'means between the shacklerod line and the walking beam and comprising a truss frame including alower member and a've'rtical member, a pivoted standardconnected withthe base and connected with one end of the lower member of the trussframe for supportingthe same, means for connecting the vertical'memberof the truss frame with the shackle rod line, and a connecting rodbetween the lower member of the truss frame and the walking beam.

4. A pump jack including a walking beam, a shackle rod line, motiontransmission means betweenthe shackle rod line and the walking beam, andsupporting means operated from. said motion transmission means andengageable with the walking beam to support the same and the partscarried thereby in the event of breakage of the shackle rod line. a

5. A' pump jack including a walking beam and; a shackle rod'linecomprising means for transmitting motion from the shackle rod line tothe walking beam, said means including a truss framehaving a verticalmember connected to the shackle rod line, a' horizontal member connectedwith the walking'beam, means for pivotally'mount- 111g the horizontalmember of the truss

